In my current playthrough I was attempting to get a wizard 12-object achievement but could not do it because no matter what I do I can't summon more than 5 planks. I have clearly tested that the problem is in the music box. Whether I add or remove it, nothing changes. Have no idea what causes this but is very irritating indeed.I can provide the save files if needed

I think I already answered your post on Steam Community, but below is my answer again. I'll also add that you can also send the save files to us at Support[at]Frozenbyte[dot]com, but I think you could try the following first. If you email us, please link one of the threads you posted, so we know it's you.

Is the problem still occurring? Also are you sure your Wizard's skills are updated? You can see the skill levels right after pressing the tab key, or other key assigned for the Skills Menu.

If there seems to be a problem with this, you could also try to verify the game cache for the game, in case the problem is there. You can do this by following the instructions below.

right-click on Trine in your Steam Library → click on Properties → choose the local files tab → click the button to verify integrity of game cache

If above didn't help, you could also try to move the item to another character and then move it back to the Wizard's inventory. Did this help?

Thank you for your reply. I am a programmer myself so I've already tried everything I could've imagined. Moving Wolfgang's box between characters just has no effect at all. Max amount of planks is always 5. When I move Red masterstone around it does change between 4 and 5.I haven't thought about game cache and I could try it but now I've run Trine at another machine and the problem persists so presumably the issue is in the savegame itself.

Yes, the problem is most likely with your save game – so, I can only recommend trying this again in another slot. Sorry for the inconvenience!

You could still try to verify the game cache, but yes unfortunately it most likely won't have any effect.

If you want to try the achievement again, remember that you also need other items for it. The full list should be the following: Wolfgang’s Music Box, Blue Masterstone, Red Masterstone and Victor's Crown.

Let me know if you have any other questions or just how it goes. Cheers!

After you told me about the Victor's crown I found out that it was my mistake and a pretty stupid one. Crown increases planks and box increases boxes. I've got the achievement with ease and would like to thank you one more time for the kind assistance and awesome games